Stercorarius pomarinus June 26. On two occasions the birds approached to within about 3 ft. of each other. At this time a noise was heard. I believe this noise was due to the violent maneuvers the birds were making to hit the other one without being hit in return. Several pair of jaeger were observed copulating on this date. June 21 Birds were observed in flocks, on Family Lagoon and South Salt Lagoon. About 15 pair of jaeger were observed. On two occasions jaegers were seen to flock a flock at Steller's Eider that had just landed. A long-tailed jaeger was observed, sitting about 15 ft. away from a or Pomarine Jaeger and was not bothered at all. June 22. On flocks was observed on Central Marsh and one flock on Elston Lagoon. Paired birds were observed scattered about the Tundra. Several nests were found and stoked. Three instances of jaeger attacking owls were observed in all cases they used the triple "yarr" not reported as earlier. One copulation was observed on Wolf/Seal Ice Slough. June 23 A pair was observed passing a lemming from one to another. A copulation was seen. In the Britton area much territoriality was observed. No new nests were found by me however. June 29- Much territoriality was observed. Unpaired birds visited on Family Lagoon. They were observed in territorial squabble with Parasitic Jaegers.